PATIKIL Sealing Gasket, 2 Packs Nitrile Rubber 1.30" OD x 0.71" ID O-Ring Washer Replacement for Air Hose Coupling Fitting, Black: Amazon.com: Industrial & Scientific
Rubber Gaskets
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Custom Slab NBR Nitrile Rubber Buna Plate Sheet Gasket 500x500mm 1mm 1.5mm 2mm 3mm 4mm Anti Slip Acid Oil Alkali Resistant Black - AliExpress